coresight: use 2K block size transfers for output via usb

For better throughput and to avoid limitations, use 2K block size
tranfers when outputting data over usb using ETR. Moreover, USB 3.0
currently only supports 2K block size for the descriptors.

Change-Id: Idc68c4d503e3ccca7715d3cbec21daedfbc2df6f
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>
1 file changed